CN113043860A - Range-extending type and engine direct-drive hybrid driving method and system - Google Patents

Range-extending type and engine direct-drive hybrid driving method and system Download PDF

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Publication number
CN113043860A
CN113043860A CN202110198745.3A CN202110198745A CN113043860A CN 113043860 A CN113043860 A CN 113043860A CN 202110198745 A CN202110198745 A CN 202110198745A CN 113043860 A CN113043860 A CN 113043860A
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China
Prior art keywords
engine
electric
range
wheels
clutch
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CN202110198745.3A
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Chinese (zh)
Inventor
马建立
侯若洪
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Shenzhen Sunshine Laser & Electronics Technology Co ltd
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Shenzhen Sunshine Laser & Electronics Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/61—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles
    • B60L50/62—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles charged by low-power generators primarily intended to support the batteries, e.g. range extenders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/24—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/28—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the electric energy storing means, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/38—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/40—Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Abstract

A method and a system for extended range and engine direct drive hybrid drive are provided, the method comprises: monitoring the speed of the extended range electric vehicle and the residual electric quantity of the power battery; when the monitored speed of the extended range electric vehicle is less than a first speed threshold and the residual electric quantity of the power battery is not less than a first electric quantity threshold, controlling the engine to stop working, inputting the electric energy of the power battery into the motor through the electric energy distribution and controller, and driving wheels to rotate by the motor; and when the residual electric quantity of the power battery is smaller than the first electric quantity threshold value, controlling the engine to work at the rotating speed with the highest fuel utilization rate, controlling the first clutch to be separated, providing power for the generator by the engine, preferentially supplying the electric energy generated by the generator to the motor through the electric energy distribution and controller, and distributing the residual part of the electric energy generated by the generator to the power battery for charging. The defect that the traditional simple extended range type generates more energy loss in the energy utilization during high-speed running can be at least partially overcome, and the energy utilization efficiency is improved.

Description

Range-extending type and engine direct-drive hybrid driving method and system
Technical Field
The invention relates to a range extending type and engine direct-drive hybrid driving method and system.
Background
The conventional extended range electric vehicle has the characteristics of saving oil compared with a fuel vehicle under the conditions of low speed and frequent need of starting and stopping under the condition of power shortage; at high speed, a part of energy loss is caused by energy conversion twice through a generator (mechanical energy is converted into electric energy) and a motor (electric energy is converted into mechanical energy), and charging and discharging of a battery, so that at high speed, the energy utilization efficiency is often low.
It is to be noted that the information disclosed in the above background section is only for understanding the background of the present application and thus may include information that does not constitute prior art known to a person of ordinary skill in the art.
Disclosure of Invention
The invention mainly aims to overcome the defects of the background technology and provide a range extending type and engine direct-drive hybrid driving method and system.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hybrid driving method of extended range type and direct drive of an engine is used for an extended range type electric vehicle, the extended range type electric vehicle comprises the engine, a generator, a first clutch, a power battery, a motor, a wheel drive and an electric energy distribution and controller, the output end of the engine is respectively coupled to one side of the generator and one side of the first clutch, the other side of the first clutch is coupled to the wheel, the output end of the generator is respectively coupled to the power battery and the motor through the electric energy distribution and controller, and the output end of the motor is coupled to the wheel; the method comprises the following steps:
monitoring the speed of the extended range electric vehicle and the residual electric quantity of the power battery;
I. when the monitored speed of the extended range electric vehicle is smaller than a first vehicle speed threshold value:
a) when the condition that the residual electric quantity of the power battery is not less than a first electric quantity threshold value is monitored, controlling the engine to stop working, inputting the electric energy of the power battery into the motor through the electric energy distribution and controller, and driving wheels to rotate through the motor;
b) when the situation that the residual electric quantity of the power battery is smaller than a first electric quantity threshold value is monitored, the engine is controlled to work at the rotating speed with the highest fuel utilization rate, the first clutch is controlled to be separated, the engine does not directly drive the wheels, the engine provides power for the generator, the electric energy generated by the generator is preferentially supplied to the motor through the electric energy distribution and control device, and the residual part of the electric energy generated by the generator is distributed to the power battery for charging.
Further:
the method further comprises the following steps:
when the monitored speed of the extended range electric vehicle is not less than a first speed threshold value:
and controlling the first clutch to be closed, and directly driving wheels by the engine.
The extended range electric vehicle further comprises a gearbox through which the other side of the first clutch is coupled to the wheel; and when in the II state, controlling the gearbox to be in a set gear with a lower gear ratio.
The method further comprises the following steps:
when the monitored speed of the extended range electric vehicle is not less than a second speed threshold value:
controlling the first clutch to be closed, and directly driving wheels by the engine;
monitoring whether the product of the driving torque force multiplied by the rotating speed and the power of the engine meet a preset matching relation:
when the product of the torque force and the rotating speed is matched with the power of the engine, the electric energy distribution and control device controls the output current of the generator to be disconnected, so that the power of the engine is completely transmitted to the wheels; when the product of the torque force multiplied by the rotating speed is monitored to be smaller than the power of the engine, the electric energy distribution and control device controls and receives the current of the generator, the corresponding received power is the power of the engine, the torque force multiplied by the rotating speed multiplied by a set coefficient, at least part of the residual power except for the situation that the engine directly drives the wheels is converted into electric energy, and the electric energy is charged into the power battery.
The second vehicle speed threshold is equal to or greater than the first vehicle speed threshold.
The method further comprises the following steps:
monitoring a speed-up instruction of the extended range electric vehicle;
when the condition that the instantaneous power demand corresponding to the speed-up command is not less than first high instantaneous power is monitored, the first clutch is controlled to be closed, the engine directly drives wheels, the electric energy distribution and control device controls the output current of the generator to be disconnected, meanwhile, the electric energy of the power battery is controlled to be input into the motor, and the motor also provides driving force for the wheels.
The wheels driven by the motor are different wheels from the wheels directly driven by the engine.
The extended range electric vehicle further comprises a gearbox and a second clutch; the other side of the first clutch is coupled to the wheel through the gearbox; the output end of the motor is coupled to one side of the second clutch, and the other side of the second clutch is coupled to the wheel through the gearbox; under the condition that the electric quantity of the power battery is sufficient, when pure electric output is carried out, the motor works in a rotating speed interval with the highest efficiency by adjusting the gear of the gearbox.
The engine is an internal combustion engine or a turbine engine.
A hybrid drive system with extended range and direct drive of an engine runs the hybrid drive method with extended range and direct drive of the engine.
An extended range electric vehicle is provided with the extended range and an engine direct-drive hybrid drive system.
The extended range and engine direct-drive hybrid driving method and system provided by the invention can at least partially overcome the defect that the traditional single extended range type generates more energy loss in energy utilization during high-speed running, can effectively improve the utilization efficiency of energy, and improves the cruising ability and the power performance of an extended range type electric vehicle.
Drawings
Fig. 1 is a schematic structural diagram of a range-extending and engine direct-drive hybrid drive system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a range-extending and engine direct-drive hybrid drive system according to another embodiment of the invention.
Fig. 3 is a schematic structural diagram of a range-extending and engine direct-drive hybrid drive system according to still another embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for either a fixed or coupled or communicating function.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be in any way limiting of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The embodiment of the invention provides a range-extended and engine direct-drive hybrid driving method, which is used for a range-extended electric vehicle and is shown in fig. 1 to 3, wherein the range-extended electric vehicle comprises an engine, a generator, a first clutch (namely, a clutch A), a power battery, a motor, wheels and an electric energy distribution and controller, the output end of the engine is respectively coupled to one side of the generator and one side of the first clutch, the other side of the first clutch is coupled to the wheels through a corresponding transmission mechanism, the output end of the generator is respectively coupled to the power battery and the motor through the electric energy distribution and controller, and the output end of the motor is coupled to the wheels through the corresponding transmission mechanism.
The method of the embodiment of the invention comprises the following control modes:
and monitoring the speed of the extended range electric vehicle, and monitoring the residual electric quantity of the power battery.
When the vehicle speed of the extended range electric vehicle is monitored to be smaller than a first vehicle speed threshold value, if the residual electric quantity of the power battery is monitored to be not smaller than a first electric quantity threshold value, the engine is controlled to be shut down and not work, the electric energy of the power battery is input into the motor through the electric energy distribution and controller, and the motor drives wheels to rotate.
When the vehicle speed of the extended range electric vehicle is monitored to be smaller than a first vehicle speed threshold value, if the residual electric quantity of the power battery is monitored to be smaller than a first electric quantity threshold value, the engine is controlled to work at the rotating speed with the highest fuel utilization rate, the first clutch is controlled to be separated, the engine does not directly drive the wheels, the engine provides power for the generator, the electric energy generated by the generator is preferentially supplied to the motor through the electric energy distribution and controller, and the residual part of the electric energy generated by the generator is distributed to the power battery for charging.
In a preferred embodiment, the method further comprises the following control mode:
and when the monitored speed of the extended range electric vehicle is not less than a first speed threshold value, controlling the first clutch to be closed, and directly driving wheels by the engine through the first clutch and the gearbox.
In a more preferred embodiment, the extended range electric vehicle further comprises a transmission through which the other side of the first clutch is coupled to the wheel; and when the monitored speed of the extended range electric vehicle is not less than a first speed threshold value, the gearbox is controlled to be in a gear with a set lower gear ratio.
In other preferred embodiments, the method further comprises the following control modes:
and when the monitored speed of the extended range electric vehicle is not less than a second speed threshold value, controlling the first clutch to be closed, and directly driving wheels by the engine.
Meanwhile, whether the product of the driving torque force multiplied by the rotating speed and the output power of the engine meet a preset matching relation or not is monitored.
When the product of the torque force and the rotating speed is matched with the power of the engine, the electric energy distribution and control device controls the output current of the generator to be disconnected, so that the power of the engine is completely transmitted to the wheels.
When the product of the torque force multiplied by the rotating speed is monitored to be smaller than the power of the engine, the electric energy distribution and control device controls and receives the current of the generator, the corresponding received power is the power of the engine, the torque force multiplied by the rotating speed multiplied by a set coefficient, at least part of the residual power except for the situation that the engine directly drives the wheels is converted into electric energy, and the electric energy is charged into the power battery.
The principle of the control mode is as follows:
the power P of the linear motion is F × v, where F is the tractive force and v is the speed. The corresponding rotational power is P ═ Ω × T, where Ω is angular velocity and T is torque. Since angular velocity is proportional to rotational speed and torque is a concept of force multiplied by moment arm, torque and torque are also proportional with a fixed radius. The product of the rotational speed and the torque force is proportional to the product of the angular speed and the torque force, so that a matching relationship with the engine power can be calculated by monitoring these two quantities.
The set coefficient may be a number positively correlated with Ω, where Ω is 2 π n, where n is the rotation speed; and torque is simply analogous to T ═ F × l, where l is the moment arm, and is actually an integral quantity of radius for engine rotation.
In some embodiments, the second vehicle speed threshold may be equal to or greater than the first vehicle speed threshold.
In other preferred embodiments, the method further comprises the following control modes:
in addition to monitoring the speed of the extended range electric vehicle and the residual capacity of the power battery, a speed-up command of the extended range electric vehicle is also monitored.
When the situation that the instantaneous power demand corresponding to the speed-up command is not less than the set first high instantaneous power is monitored, the first clutch is controlled to be closed, the engine directly drives wheels, the electric energy distribution and control device controls the generator to be disconnected from the output current, meanwhile, the electric energy of the power battery is controlled to be input into the motor, and the motor also provides driving force for the wheels.
In some preferred embodiments, the wheels driven by the motor are different wheels than the wheels directly driven by the engine, as shown in fig. 2. The engine direct drive and the motor drive are adopted to respectively drive different wheels, so that the difficulty in driving the same wheel can be avoided. As shown in fig. 3, in some preferred embodiments, the extended range electric vehicle further includes a transmission and a second clutch (i.e., clutch B); the other side of the first clutch (i.e., clutch a) is coupled to the wheel through the transmission; the output end of the motor is coupled to one side of the second clutch, and the other side of the second clutch is coupled to the wheel through the gearbox; under the condition that the electric quantity of the power battery is sufficient, when pure electric output is carried out, the motor works in a rotating speed interval with the highest efficiency by adjusting the gear of the gearbox. In the embodiment, the engine and the motor drive the wheels through driving the gearbox, so that the benefit is that for the range-extended electric vehicle, as the main purpose of range extension is to relieve 'mileage anxiety', most of the vehicle owners can charge the vehicle most of the time, and the vehicle is used according to a pure electric vehicle. The common electric vehicle saves cost and is not provided with a gearbox, thereby sacrificing the energy saving property of the electric vehicle when the electric vehicle runs at high speed. The extended range electric vehicle of the embodiment can also play the role of the gearbox when being used as pure electric output under the condition that the electric charging quantity is sufficient, and the motor works in the rotating speed interval with the highest efficiency by adjusting the gear of the gearbox, so that the aim of saving electric energy at low speed and high speed is fulfilled.
In another embodiment, as shown in fig. 1 to 3, an extended-range and engine direct-drive hybrid drive system includes an engine, a generator, a first clutch, a power battery, a motor, a gearbox, wheels, and an electric power distribution and controller, wherein an output end of the engine is coupled to one side of the generator and one side of the first clutch, respectively, an output end of the first clutch is coupled to the wheels through the gearbox and a corresponding transmission mechanism, an output end of the generator is coupled to the power battery and the motor through the electric power distribution and controller, respectively, and an output end of the motor is coupled to the wheels through the corresponding transmission mechanism; the range-extending type and engine direct-drive hybrid driving system operates the range-extending type and engine direct-drive hybrid driving method.
In yet another embodiment, an extended range electric vehicle (vehicle body not shown) has the above mentioned extended range and engine direct drive hybrid drive system, referring to fig. 1 to 3, the system includes an engine, a generator, a first clutch, a power battery, an electric machine, a gearbox, wheels, and an electric power distribution and controller, the output end of the engine is coupled to one side of the generator and the first clutch, respectively, the other side of the first clutch is coupled to the wheels through the gearbox and a corresponding transmission mechanism, the output end of the generator is coupled to the power battery and the electric machine through the electric power distribution and controller, respectively, and the output end of the electric machine is coupled to the wheels through the corresponding transmission mechanism.
The engine in the embodiment of the present invention may be, but is not limited to, an internal combustion engine, for example, a turbine engine.
The following presents a simplified summary of the invention in its practical application.
When the vehicle runs at a low speed and the electric quantity of the power battery is sufficient, the engine is shut down and does not work. The power battery inputs electric energy to the motor through the electric energy distribution and controller, and the motor drives the wheels to rotate.
When the vehicle runs at a low speed and the power battery is in short power, the engine works at the rotating speed with the highest fuel utilization rate and enters a range extending mode, the first clutch is separated, the engine provides power for the generator, and the engine generates power. The electric energy generated by the generator is preferentially supplied to the motor as the power required by the wheels, because the engine works at the rotating speed with the highest fuel utilization rate, the rotating speed is higher, the engine works more, and the work required by the whole vehicle is not large during low-speed running, the residual power can be generated, and the residual electric energy is partially distributed and controlled to be distributed to the power battery for charging.
When the vehicle runs at high speed, the first clutch rotates to directly drive wheels and works on a higher gear (low gear ratio) of a conventional fuel vehicle, namely the vehicle runs at high speed, and the engine is used for providing higher rotating speed, so that the fuel utilization rate is better.
Through the gearbox, several higher gears can be provided, and the vehicle can be matched with a gear ratio with higher efficiency at medium-high speed.
When the first clutch is closed and the engine power directly drives the wheels during high-speed running, whether the product of the torque force multiplied by the rotating speed and the engine power meet the set matching relation or not is detected.
When the product of the torque force and the rotating speed is matched with the power of the engine, the electric energy distribution and controller controls the disconnection of the input current of the generator, so that the kinetic energy of the engine is completely transmitted to the wheels.
When the product of the torque force and the rotating speed is less than the power of the engine, the electric energy distribution and controller controls and receives the current of the generator, the received power is the power of the engine-the torque force, the rotating speed and a specific coefficient, the residual power driven by the engine to wheels is converted into electric energy, and the electric energy is charged into a power battery.
In addition, when the driver speeds up the vehicle and needs high instantaneous power, the electric energy distribution and control device disconnects the input current of the generator and controls the power battery to output current to the motor so as to provide electric power for driving the wheels.
The background of the present invention may contain background information related to the problem or environment of the present invention and does not necessarily describe the prior art. Accordingly, the inclusion in the background section is not an admission of prior art by the applicant.
The foregoing is a more detailed description of the invention in connection with specific/preferred embodiments and is not intended to limit the practice of the invention to those descriptions. It will be apparent to those skilled in the art that various substitutions and modifications can be made to the described embodiments without departing from the spirit of the invention, and these substitutions and modifications should be considered to fall within the scope of the invention. In the description herein, references to the description of the term "one embodiment," "some embodiments," "preferred embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope of the claims.

Claims (11)

1. The range-extended and engine direct-drive hybrid driving method is used for a range-extended electric vehicle and is characterized in that the range-extended electric vehicle comprises an engine, a generator, a first clutch, a power battery, a motor, wheels and an electric energy distribution and controller, wherein the output end of the engine is respectively coupled to one side of the generator and one side of the first clutch, the other side of the first clutch is coupled to the wheels, the output end of the generator is respectively coupled to the power battery and the motor through the electric energy distribution and controller, and the output end of the motor is coupled to the wheels; the method comprises the following steps:
monitoring the speed of the extended range electric vehicle and the residual electric quantity of the power battery;
I. when the monitored speed of the extended range electric vehicle is smaller than a first vehicle speed threshold value:
a) when the condition that the residual electric quantity of the power battery is not less than a first electric quantity threshold value is monitored, controlling the engine to stop working, inputting the electric energy of the power battery into the motor through the electric energy distribution and controller, and driving wheels to rotate through the motor;
b) when the situation that the residual electric quantity of the power battery is smaller than a first electric quantity threshold value is monitored, the engine is controlled to work at the rotating speed with the highest fuel utilization rate, the first clutch is controlled to be separated, the engine does not directly drive the wheels, the engine provides power for the generator, the electric energy generated by the generator is preferentially supplied to the motor through the electric energy distribution and control device, and the residual part of the electric energy generated by the generator is distributed to the power battery for charging.
2. The range-extending and engine direct drive hybrid drive method of claim 1, further comprising:
when the monitored speed of the extended range electric vehicle is not less than a first speed threshold value:
and controlling the first clutch to be closed, and directly driving wheels by the engine.
3. The extended range and engine direct drive hybrid drive method of claim 2, wherein the extended range electric vehicle further comprises a transmission through which the other side of the first clutch is coupled to the wheel; and when in the II state, controlling the gearbox to be in a set gear with a lower gear ratio.
4. The range-extending and engine direct drive hybrid drive method according to any one of claims 1 to 3, further comprising:
when the monitored speed of the extended range electric vehicle is not less than a second speed threshold value:
controlling the first clutch to be closed, and directly driving wheels by the engine;
monitoring whether the product of the driving torque force multiplied by the rotating speed and the power of the engine meet a preset matching relation:
when the product of the torque force and the rotating speed is matched with the power of the engine, the electric energy distribution and control device controls the output current of the generator to be disconnected, so that the power of the engine is completely transmitted to the wheels; when the product of the torque force multiplied by the rotating speed is monitored to be smaller than the power of the engine, the electric energy distribution and control device controls and receives the current of the generator, the corresponding received power is the power of the engine, the torque force multiplied by the rotating speed multiplied by a set coefficient, at least part of the residual power except for the situation that the engine directly drives the wheels is converted into electric energy, and the electric energy is charged into the power battery.
5. The range-extending and engine direct drive hybrid drive method of claim 4, wherein the second vehicle speed threshold is equal to or greater than the first vehicle speed threshold.
6. The range-extending and engine direct drive hybrid drive method of claim 4, further comprising:
monitoring a speed-up instruction of the extended range electric vehicle;
when the condition that the instantaneous power demand corresponding to the speed-up command is not less than first high instantaneous power is monitored, the first clutch is controlled to be closed, the engine directly drives wheels, the electric energy distribution and control device controls the output current of the generator to be disconnected, meanwhile, the electric energy of the power battery is controlled to be input into the motor, and the motor also provides driving force for the wheels.
7. The range-extending and engine direct drive hybrid drive method according to any one of claims 1 to 6, wherein the wheels driven by the electric motor and the wheels directly driven by the engine are different wheels.
8. The extended range and engine direct drive hybrid drive method of any one of claims 1 to 6, wherein the extended range electric vehicle further comprises a gearbox and a second clutch; the other side of the first clutch is coupled to the wheel through the gearbox; the output end of the motor is coupled to one side of the second clutch, and the other side of the second clutch is coupled to the wheel through the gearbox; under the condition that the electric quantity of the power battery is sufficient, when pure electric output is carried out, the motor works in a rotating speed interval with the highest efficiency by adjusting the gear of the gearbox.
9. The range-extending and engine direct-drive hybrid driving method according to any one of claims 1 to 6, wherein the engine is an internal combustion engine or a turbine engine.
10. A range-extending and engine direct-drive hybrid drive system, characterized by operating the range-extending and engine direct-drive hybrid drive method as claimed in any one of claims 1 to 9.
11. An extended range electric vehicle having the extended range and engine direct drive hybrid drive system of claim 10.
CN202110198745.3A 2021-02-22 2021-02-22 Range-extending type and engine direct-drive hybrid driving method and system Pending CN113043860A (en)

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